Sony WatchCorder EVT-820 User manual

Before operating the unit, please read this manual thoroughly
and retain it for future reference.
Mode demploi page 20
Avant ia mise en service de cet appareil, priére de lire
attentivement ce mode d'emploi que l'on conservera pour toute
référence ultérieure.
TILE COPY
PROPERTY
OF
THE
WatchCorder
Man.
THERMAL
DET
©1989 by Sony Corporation

The model and serial number of your set are located on the
rear. Record the serial number in the space provided below.
Refer to these numbers whenever you call upon your Sony
dealer regarding this product.
Model No. EVT-820 Serial No.
CAUTION
The format used in the time lapse recorder EVT-820
differs from the regular 8 mm video format. This unit
cannot be used to play 8 mm video cassettes. However,
cassettes recorded on this unit may be viewed on a
normal 8 mm video cassette recorder.
To prevent fire or shock hazard, do not ex-
pose the unit to rain or moisture.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This symbol is intended to alert the
user to the presence of uninsulated
“dangerous voltage” within the prod-
uct's enclosure that may be of suffi-
cient magnitude to constitute a risk of
electric shock to persons.
This symbol is intended to alert the
user to the presence of important
operating and maintenance (servicing)
instructions in the literature accompa-
nying the appliance.
WARNING
This equipment generates, uses, and can radiate radio
frequency energy and if not installed and used in accordance
with the instructions manual, may cause interference to
radio communications. It has been tested and found to
comply with the limits for Class A computing devices
pursuant to Subpart J of Part 15 of FCC Rules, which are
designed to provide reasonable protection against such
interference when operated in a commercial environment.
Operation of this equipment in a residential area is likely to
cause interference in which case the user at his own
expense will be required to take whatever measures may be
required to correct the interference.
For the customers in Canada
This apparatus complies with the Class A limits for radio
noise emissions set out in Radio Interference Regulations.

| ‘Table of Contents
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Location and function of controls . 0... cee nee e nee eens 6
Preparation
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Setting the date and time ........ 0... cence eens 12
Inserting the cassettes ..o is sea ascites Shadale ie, eb ace 08 Rise wees 8 FS4 Va ARES 14
Selecting the recording time ... 0.0... ec eee ee eee eee 15
Operation
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REC LOCK 1Unclion:. «6... ddssas tities isd CN e ee eed Supe ese Se ee 17
Repeated recording on the same cassette ......... 0.0... cee eee eee eee 17
Automatic recording restart after a power interruption... ............... 020 cee ee 17
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Alarm sensor connection. ........ 0... c eee ee eee eee e eee eee nes 18
Selecting the alarm recording period ... 2... cc eee eens 18
Displaying the alarm list 2.0... kc cee eee ete eee eens 20
Searching the picture when the alarm function worked. .............. 00-00 c eee 20
THMEr. PECOMGING: f o34 Sie Seed wee eee ROE ae Kee 2 oh tee See Mavee Sele tale eles 21
Using the internal timer... ee Sk care eee eee acne ees eee 21
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Playbackss 6.00 4 hinshctdee eaten oor shane ds Pena Mate olen ate ae 25
Various playback fUNCtIONS ...... 0... . cet eee e eee teens 26
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Frame still picture with
high resolution
The frame still picture doubles vertical resolution in comparison to the field still
picture.
* Horizontal resolution is improved to more than 380 lines in black-and-white mode and
more than 260 lines in color mode.
Six time lapse modes
The time lapse intervals for recording can be set in six steps, from 1 frame per 0.25
seconds to 1 frame per 16 seconds. At the longest interval setting, available recording
time is a full 760 hours (about 31 days) with one 90-minute tape.
Field still picture with digital
memory
For clear and unblurred viewing of fast-moving objects, single fields stored in digital
memory can be displayed.
Versatile recording
functions
¢ Alarm recording — Automatic recording at shortest time mode setting when alarm
sensor is activated.
© Timer recording — Two kinds of timer recording
Internal timer recording: Automatic recording at the desired time on the desired days of
the week. Up to three programs can be preset for one week.
External timer recording: Automatic start of recording when power is supplied from an
external timer.
* Repeat recording — Automatic rewind at tape end, and recording restart at tape
beginning.
Alarm recall and alarm
search function
Up to 10 alarm recordings can be listed and the alarm date, time and current time are
shown (“Alarm recall’). A still picture can be also obtained at the alarm recording portion
(‘Alarm search’).
Time/date generator
Time and date information, which is invaluable for surveillance and monitoring purposes,
can be recorded together with the picture.
Informative display with
tape counter
The recording condition and other settings can be checked at a glance on the easy-to-
read display. The REC indicator flashes in the same interval as the selected time mode,
and the ALARM indicator alerts of any alarm sensor operation.
Power failure backup
and automatic recording
restart
Time and date settings are retained for up to 72 hours even in the case of a power
interruption. During recording, when power is restored, recording automatically continues
in the previously selected mode.
REC LOCK function
To guard against operation errors, the record mode can be locked, so that recording
is not interrupted even if a button is accidentally pressed.

On safety
© Operate the unit only on 120V AC, 50/60 Hz.
* Should any solid object or liquid fall the cabinet, unpiug the unit and have it checked
by qualified personnel before operating it any further.
* Unplug the unit from the wall outlet if it is not to be used for an extended period of
time. To disconnect the cord, pull it out by the plug. Never pull the cord itself.
On installation
© Allow adequate air circulation to prevent internal heat build-up. Do not place the unit on
surfaces (rugs, blankets, etc.) or near materials (curtains, draperies) that may block the
ventilation slots.
* Do not install the unit near heat sources such as radiators or air ducts or in a place
subject to direct sunlight, excessive dust, mechanical vibration or shock.
¢ The unit is designed for operation in a horizontal position. Do not install it in an
inclined position.
¢ Keep the unit and cassette tapes away from equipment with strong magnets, such as a
microwave oven or a large loudspeaker.
© Do not place any heavy object (more than 13 kg, 28 Ibs) on the unit.
On operation
© When the unit is not in use, turn the power off to conserve energy and to extend its
useful life.
© Remove and store video cassettes after recording or playback.
On cleaning
Clean the cabinet, panel and controls with a dry soft cloth, or a soft cloth lightly
moistened with a mild detergent solution. Do not use any type of solvent, such as
alcohol or benzine, which might damage the finish.
On repacking
Do not throw away the carton and packing materials. They make an ideal container in
which to transport the unit. When shipping the unit to another location, repack it as
illustrated on the carton.
On cassette care
Store cassettes in their cases and keep them in an upright position to prevent intrusion
of dust and uneven winding.
If you have any questions about this unit, contact your Sony dealer.

Front Panel and Top Cover
i i ec POWER switch and indicator
EJECT indicator
Lights up while a cassette is being
| ejected.
Cassette holder
Tape
operation
buttons
ALARM
RECALL
button
Press to display the date and time
when the alarm function worked.
Up to 10 alarms are displayed.
When the alarm function worked
11 times or more (up to 99), only
the count number is displayed.
STOP/EJECT @/ button
REC @ (record) button
To start recording, press this button and the » button.
REW <a/@) (rewind) button
Pressing the button during playback permits review
(rewind while viewing the picture).
ALARM SEARCH button
Press this button in the stop
mode, and then the « or » button
to search the portion of the alarm
recording. The unit is set in the
still mode at the portion of the
alarm recording.
REV < (reverse) button
FWD e (forward) button
FF e»/e> (fast-forward) button
Pressing the button during playback permits cueing
(fast-forward while viewing the picture).
STILL/FRAME <u button
Press the button once to view a still picture. Each
subsequent push then switches the picture back by
one frame. If the field mode was chosen with the
FRAME/FIELD button, the picture moves by one field.
FRAME/FIELD button
Serves to select the still picture
playback mode.
Each push cycles the setting
through Field 1, Field 2, and
STILL/FRAME 11» button Frame.
Press the button once to view a still picture. Each
subsequent push then advances the picture by one
frame. If the field mode was chosen with the
FRAME/FIELD button, the picture moves by one field.
6
COUNTER RESET button

PB SPEED switch
Toggles the unit between regular playback
speed and the speed shown by the TIME MODE
indicator.
TIMER REC (recording) switch
INT: to start or stop recording at the time
preset with this unit
EXT: to start or stop recording at the time
preset with the connected timer
OFF: when the timer function is not in use
TIME MODE button
Selects the recording time mode (interval
setting).
Each push cycles the setting through 12 H,
24 H, 48 H, 96 H, 192 H, 760 H.
SET, ADJUST buttons
Serve to set the date and time.
Time date generator selector:
T.D. (time/date) SET: to set the time and date
T.D. (time/date) POSITION: to change the
position of the time and date
TIMER SET: to set the built-in timer
REPEAT REC (recording) switch
Set to ON to use the same cassette for
repeated recording. At the tape end, the
cassette is automatically rewound and
recording restart from the beginning.
Only if the alarm sensor was activated,
the tape stops at the tape end.
REC (recording) LOCK switch
When set to ON, all front-panel buttons
are inoperative after recording is started.
This serves to prevent operation errors.
(aon) |
PRL ISFIeye°

Display Panel
TIMER REC indicator
Recording mode indicator
The indicator lights up during recording
and flashes in the same interval as the
selected time mode.
|
| Time mode indicator
| Shows the recording time
j
when P6-90 tape is used.
Still picture mode
indicator
| [12H 24H 48H 96H 192H 760H} |
FRAME
FIELD 12)
SEARCH
ALARNM indicator
Lights up when the alarm sensor has
activated in alarm recording.
TAPE END indicator
Tape counter BF ete Sa
!
| Search mode indicator —~7

Rear Panel
eee
Ground terminal
Video mode switch
AUTO COLOR: Normally set to this position.
The unit is automatically set to the color mode
or black-and-white mode according to the
received signals.
B & W: When the S/N of the black-and-white
signal is not sufficient and the unit cannot be
switched to the black-and-white mode
automatically, set to this position.
~ -- EXT. TIMING OUT (external timing output)
connector (BNC connector)
Connect to the external timing in connector of the
switcher to switch the video cameras connected to
the switcher.
The video cameras are switched every one frame by
synchronization with the recording TIME MODE of this
unit.
Should you wish to switch the video cameras every
four frames, please consult your Suny dealer.
~ VIDEO IN connector (BNC connector)
Connect to the video output of the video camera.
VIDEO OUT connector (BNC connector)
Connect to the video input of the monitor. During
recording and standby, the signal from the VIDEO IN
connector is routed straight to the output. During
playback, the signal from the tape is supplied.
HEAD HOURS meter
Indicates accumulated time of head drum rotation to
provide a reference for maintenance.
SERIES REC (recording) terminals
Connect another EVT-820 recorder. After the recording
is filled on the cassette of this unit, the recording is
continued on the cassette of another recorder.
-~- =~ Power cord
Ground terminal
For SERIES REC connection or alarm sensor
connection, use this terminal.
ALARM OUT (alarm recovery output) terminal
During alarm recording, a voltage of +5 V is applied to
the connected equipment.
- ALARM IN terminal
Connect an alarm sensor.
ALARM REC (recording) PERIOD selector
MAN Alarm recording continues for as long as
(manual) | the alarm sensor is ON.
2 MIN Alarm recording continues for 2 minutes
after the alarm sensor was activated.
10 SEC Alarm recording continues for 10 seconds
j i
oak after alarm sensor was activated. |

Preparation
eal to AC outlet i
to VIDEO IN to VIDEO OUT
to video input
to video output
Use of the BNC connector
—-O
<> H
Align pin with cutout, insert and i
turn right to lock. j
To remove, turn left and pull out. }
a
¥
Video camera 0 i
Monitor
For alarm sensor connection, refer to page 18.
For timer connection, refer to page 24.
10

Connecting a switcher
Monitor
EVT-820
Cora.
Video camera
aaa
to
EXT
TIMING
OUT}
(00000
°
0
Fe
O00
to VIDEO IN
to EXT TIMING IN to MONITOR OUTPUT
® Qocco00UN ~-ss Note
peooeopo0o «oD When several cameras are used,
Camera switcher ~ synchronize the cameras. If not, the
picture will be disturbed.
Connecting another EVT-820 in series
EVT.820 (2nd) to SERIES REC IN
EVT-820 (1st)
ai to VIDEO to VIDEO it
ee IN IN =
to VIDEO
IN
Video Camera
— | |
Video separater
Notes
* Install the cassette in the 2nd and subsequent By Te20 em)
recorders also and turn off the power.
¢ Set the REPEAT REC switch to OFF.

AOHEO0°* ss)
1 Turn on the camera, monitor and EVT-820
9s Set the time date generator selector to T.D. SET.
Press the SET button for 3 seconds.
The year flashes.
During the adjustment, the clock stops. sana
Press the ADJUST button to call up the desired number.
When no adjustment of that iter is necessary, just proceed to the next
step.
JANOLDO-
Number setting Tapping the ADJUST button once advances the -
00:00:0
number by one count. When the button is kept depressed, the numbers
advance continuously.
Press the SET button aid repeat step 4 until the date,
(month, day) and time (hour, minute) is correct. Setting
MAY-14,90 example:
PM 7:30:00 May
i 1990, 7:30 p.m.
6 Press SET to enter the setting.
The clock starts moving from 00 seconds.
MAY-11-90
PM 7:30:00
A A A A A anRMeD Me NENCCRT RCN - Fe AE ma SU AR RO RL RN OA tae mon nem etcaeNnm
After a power interruption
If power was interrupted for less than 72 hours (and
the backup battery was fully charged), correct date and
time will be maintained. The selected recording mode
is also stored, so that recording automatically
continues after power is restored.
The internal backup battery is charged while the unit is
operating.
For a full charge, the unit must be plugged in for about
40 hours.
12

To change the adjusted item during setting
Press the SET button repeatedly until the clock starts
operating.
Press the SET button for 3 seconds so that the year
item blinks.
Press the SET button repeatedly until the item to be
changed blinks.
Change the item with the ADJUST button and then
press the SET button.
To readjust the date or time after the setting has
been completed.
1
2
3
4
Set the time date generator selector to T.D. SET.
Press the SET button for 3 seconds.
Press the SET button repeatedly until the digits to be
changed blink.
Change the item with the ADJUST button and press
the SET button repeatedly until the clock starts
Operating.
After setting the date and time
Set the time date generator selector to T.D. SET.
To change the position of the date and time
display
1 Set the time date generator selector to T.D.
POSITION.
2 Press the SET button.
Each push of the SET button sequentially changes the
position of the date and time display.
MAY-11-90 ntnsnennomnnemomes MAY-11-90
PM 7:30:00 PM 7:30:00
i
eee MAY-1 1-90
PM 7:30:00
MAY-11-00.¢___ |
PM 7:30:00
no indication
(The date and time is not recorded
with the picture)
13

14
Inserting the Cassette
1 Turn on the power.
2 Press the M/# button.
3 Fully insert the cassette with the
tape window side up.
4 Close the cassette holder.
Removing the cassette
1 Turn on the power.
2 Press the M/# button.
3 Remove the cassette and close the cassette holder.
Always insert the cassette correctly, with the
window facing up. Video cassettes can only be used
on one side.
Note
According to the tape, there are a few creases at the
beginning and end of the tape. The picture quality will
be reduced at these portions.
Tab window red:
recording not possible.
Record prevention tab
When a recording is made on a cassette, any previous
material will be automatically erased. To protect a
cassette from accidental erasure, slide the tab on the
rear of the cassette to the left, so that the tab window
is red.
Tab in original position:
recording possible.

TIME MODE
Press the TIME MODE button to select the desired recording time.
Each push of the button cycles the unit through six possible settings.
Recording time and intervals
¢ The EVT-820 is designed and calibrated with
90-minute tape (Sony P6-90). To ensure stable
operation and optimum picture quality, the use of
Sony 90-minute tape is recommended.
¢ Do not use the ME tape.
sive iicdle Indicator Maximum recording time Maximum recording time for other tapes
| with 90-minute tape 30-minute tape 60-minute tape
ka 12H 12 hours Hs approx. 0.25 second _ ; 4 hours 8 hours
24H 24 hours approx. 0.5 second 8 hours 16 hours
48H 48 hours (2 days) ] approx. 1 second i: 16 hours 32 hours
96H 96 hours (4 days) approx. 2 seconds 32 hours 64 hours *
192H 192 hours (8 days) approx. 4 seconds 64 hours 128 hours
760H 760 hours (31 days) | approx. 17 seconds 253 hours 506 hours
On cassettes The principle of extended recording
The extremely long recording times offered by the
EVT-820 are made possible by moving the tape only
for small incremental steps while a video picture is
recorded.
For more extended recording
Connect another EVT-820 to the SERIES REC terminals
of this unit. After the cassette of this unit ends,
recording will be continued on a cassette of another
EVT-820. (See page 11.)
15

16
“© Operation
| 1 Turn on the camera and monitor
Turn on the EVT-820.
Confirm that the picture from the camera is shown on the monitor.
3 i wishing to record the date and time, set the time date generator selector to T.D.
3 position and press the SET button to decide the position of the date and time.
Confirm that the correct date and time are displayed.
~——
j
4
|
i
As Select the recording time with the TIME MODE button.
5 Insert the cassette.
: * =
b 6 i While pressing the @ button, press the » button.
Recording will start.
To stop recording When the tape end is reached
Press the @/@ button. The TAPE END indicator on the display panel lights up
and the tape stops. Power to the unit is not switched
If recording does not start and the cassette holder off automatically.
opens
The record prevention tab is set to prevent recording. When the unit cannot be switched to the black-and-
Change the tab setting (see page 14). white mode correctly according to the signal from
the black-and-white video camera
Set the video mode switch to B & W.

Locking the record mode is useful to guard against accidental recording interruptions when the unit is used for
surveillance or monitoring purposes.
Selector
switch
|
J
as
ces,
eee
on
the
front
panel
are
i
anel om Com i .
sae t REC LOGK (The buttons and switches on the
eB 7 es au ! selector switch panel can be used :
om i } normally) :
; OFF ON i 4
ooe — s |
To stop recording, set the REC LOCK switch to “OFF” and then press the l/# button.
This function is suitable for applications where the recording is only to be used when something unusual has
occurred. Before repeat recording, perform daily check routine (see page 27).
When the tape end is reached, the
fee cassette is rewound and recording starts
Selector switch
panel REPEAT REC again from the beginning. If the @/#
button or another transport button was
pressed during automatic rewind, repeat {
OFF ON ' recording is not carried out.
{
mnaal, i i
If alarm recording was carried out at
least once, the tape stops at the tape
end.
Automatic Recording Restart after a Power Interruption
This feature is also useful for example in banks or offices, where power is cut off overnight during recording.
Recording will automatically continue when power is switched on in the morning.
automatically.)
Before
power
Power
interruption
Power
is
restored
The
internal
backup
battery
maintains
}
interruption
after
15
hours.
date
and
time
settings
as
well
as
the
{
selected
record
mode
for
up
to
72
hours.
j
-) ) When power is restored, recording
= = automatically continues in the
MAY-11-90 MAY-12-90 previously selected mode. :
PM 6:00:00 AM 9:00:00 i
Monitor (Recording restarts 4
|
4
For full backup battery charge, If “::::” appears instead of date and time
the unit must be plugged in for about 40 hours. display
Set the date and time again and charge the backup
battery fully.

A door switch or alarm sensor can be used to trigger alarm recording. During alarm recording, the 12 hour (12H) time mode
setting is automatically selected, to provide detailed picture information, and a voltage of +5V is applied to the connected
equipment.
Alarm Sensor Connection
. Commercially
ALABM OUT. Fe available
switching box, etc.
ALARM IN
Commercially
available alarm sensor
wt, : Signal flow
Selecting the Alarm Recording Period
ALARM REC PERIOD | Alarm recording continues:
MAN o—_------__—___ for as long as sensor is ON
2 MIN eee U ~---- for 2 minutes after sensor was activated.
10 SEC e--- es anne for 10 seconds after sensor was activated.
ghee aad
Other recording period settings are also possible. Please consult your Sony dealer for details.
18

Display during alarm recording
During alarm recording
Flashes in shortest time mode setting
Lights up.
Alarm recording terminated
Regular recording resumes.
Indicator stays lit to show that alarm
recording was carried out.
v
Recording stops at tape end.
CITt atarM
LILI tape END
Monitor
MAY-11-90
PM 7:30:00
{An “ALARM <01>” is recorded
on sections which were taken
Lights up. | |
|
during alarm recording.) |
Alarm count number
When the date and time display are located at the lower right
position, the ALARM <01> indication is displayed at the lower
left position.
To go off the ALARM indication
Press the M/# button and stop the tape.
When the tape is at its end, the cassette will be ejected.
19

Searching the Picture when the Alarm
:
ALARM RECALL
Press the ALARM RECALL button.
The date and time when the alarm function worked
and the number will be listed up to 10 times.
When the date and time are not adjusted, the “- -”
is displayed.
When the alarm function has worked 11 times or
more, only the count number will be displayed.
When the alarm function has worked 100 times or
more, the count number remains at 99 times.
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
MAY-17-90
ALARM <GQ>
ak
1
2
3
4
5
6
7
8
9
0
*
Count number
When the ALARM RECALL button is pressed
during recording
The alarm list can be recorded with the picture
while shooting with video camera.
The list disappears after approximately 30 seconds.
When the ALARM RECALL button is pressed
during internal timer recording, the ALARM
RECALL button does not function.
When the ALARM RECALL button is pressed
in other modes
The alarm list will be displayed.
To turn off the list, press the ALARM RECALL
button again. (The list remains in memory).
To clear the memory of the alarm list
Eject the cassette.
To store the list, record it.
Ne AR A AEE RAS AEE ET RETIN eR SEER ERENCE RCE it URL ORIN: ESN OEM ENOAEM et
pabemeicnectte! save 3a
je al)
‘ Goneee°*! ol
i
ALARM SEARCH
1 Press the ALARM SEARCH button in
stop mode.
Press the < or » button.
The cassette will stop at the portion where the
alarm function worked and the still picture
playback is displayed.
blinking
To search the next or previous alarm picture
Press the « or » button (while the SEARCH
indicator appears).
To release the ALARM SEARCH mode
Press the ALARM SEARCH or M@/@ button.
|
i
i
}
Notes on searching the alarm picture correctly
© Record the alarm picture for more than 10 seconds.
© Record the picture more than 100 frames between the
alarm recordings (ex. for more than 25 seconds in 12H
mode.)
ALARM REC ALARM REC
more than
100 frames
more than
10 seconds
¢ For alarm search operation, set the PB SPEED switch
to STD. Otherwise, it takes a long time to search the
picture.